This is a useful book although it is small. It contains some technical terms for da'wah in English. No doubt all scholars and callers to Islam in English are in much need to something like that to conveys the right message of Islam to all those speak English.
A nice discussion of some important points needed by those callling to Islam
Source: http://www.islamhouse.com/p/1243
have you ever asked; why was I created? why I am here? what am I doing in this world? why did God created me?.. This book will help you find the answers.
Author: Abu Ameenah Bilal Philips
Publisher: http://www.islambasics.com - Islam Basics Website
ًWhat is Islam?: This book explains basic introduction to the fundamental beliefs and practices of the Islamic faith. An attempt has been made to be as concise as possible, but with the hope that the reader will be encouraged to study Islam in more depth.
Author: Jamaal Zarabozo
Publisher: Ministry of Islamic Affairs, Endowments, Da‘wah and Guidance
A booklet presented by IPC (Islamic Presentation Committee) to show people who is the Prophet Muhammad (Peace be upon him). It is divided into five sections: introduction, his life, his moral characteristics and mannerisms, his miracles and conclusion.
Publisher: http://www.ipc-kw.net - Islamic Presentation Committee Website - Kuwait
Discusses the question of why Allah created, and why Allah created humans.
Author: Abu Ameenah Bilal Philips
Reveiwers: Muhammad AbdulRaoof
Publisher: Cooperative Office for Propagation, Guidance, and Warning of Expatriates in the city of Sultanah, Riyadh - A website Islamic Library www.islamicbook.ws